High energy density, flexible, low temperature resistant and self-healing Zn-ion hybrid capacitors based on hydrogel electrolyte

Ji, Guochen; Hu, Ruofei; Wang, Yihe; Jiao, Zheng

doi:10.1016/j.est.2021.103858

Cited by 34 publications

(18 citation statements)

References 37 publications

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“…S65, S66, Table S4, ESI †). 66,[83][84][85][86][87][88] To further examine the real-time influence of environment on the output performance of the CP/EGZn/betaine ZICs in practical application, they were tested in a thermostat with the temperature varying from À40 1C to 80 1C. Intriguingly, the quasi-solid ZICs could endure both low and high temperature tests in turn, and their capacity well recovered when the temperature was set back to 20 1C (Fig.…”

Section: Proof-of-concept Demonstrations Of Environmentally Adaptive ...mentioning

confidence: 99%

“…CP/EGZn/betaine-based ZIC: (c) cycling stability at 2 A g À1 ; (d) capacity and Coulombic efficiency plots at 0.5 A g À1 at different temperatures from À40 1C to 20 1C and from 20 1C to 80 1C. (f) Ragone plot of ZICs in comparison with previously reported ZICs based on different hydrogel electrolytes 66,[83][84][85][86][87][88]. Continuous destructive tests include (e) hammering test, (g) squeezing, rolling, folding, and compressing, and (h) punching and cutting.…”

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confidence: 96%

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All-round supramolecular zwitterionic hydrogel electrolytes enabling environmentally adaptive dendrite-free aqueous zinc ion capacitors

Hao

Zhang

et al. 2023

Energy Environ. Sci.

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Section: Proof-of-concept Demonstrations Of Environmentally Adaptive ...mentioning

confidence: 99%

mentioning

confidence: 96%

All-round supramolecular zwitterionic hydrogel electrolytes enabling environmentally adaptive dendrite-free aqueous zinc ion capacitors

Hao

Zhang

et al. 2023

Energy Environ. Sci.

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“…By constructing the hydrogel in various ways, such as producing polyionic chains, adding noncovalent crosslinking, and so on, the hydrogel electrolyte may be endowed with functional qualities such as high ion conductivity, self‐healing, and flexibility. [ 120–122 ] A gel electrolyte constructed from poly(vinyl alcohol)/zinc/ethylene glycol, which had antifreeze properties and was stable and harmless, was reported by Liu et al [ 120 ] (Figure 12a). Strong ionic conductivity and favorable antifreeze capability (even at −40°C) were achieved in this gel electrolyte membrane.…”

Section: Electrolyte Optimizationmentioning

confidence: 99%

“…[121] A wider working voltage range could be achieved in organic and IL electrolytes, increasing the energy density of the ZHSCs. [122,123] Zhou et al [122] developed novel ZHSCs employing functionalized carbon nanosponges as the positive electrode and Zn (CF 3 SO 3 ) 2 as the salt in both an IL and acetonitrile. DFT calculations further revealed the proton transport process.…”

Section: Special Electrolytesmentioning

confidence: 99%

“…The volumetric energy density of the fully packed cell using the IL (0.1–2.4 V) was 54.3 Wh L −1 because of its high capacitance and wide voltage range, which was equivalent to that of lead‐acid batteries. [ 122 ] Unlike common aqueous electrolytes only using water, a low‐cost, stable, and environmentally friendly hybrid electrolyte, including mixed solvents consisting of water and ethylene glycol with ZnSO 4 , was prepared and it showed excellent conductivity (6.9 mS cm −1 at −40°C) and excellent recyclability of its zinc metal. The hydrogen bonds between ethylene glycol and water could be enhanced by the solvation interaction of zinc ions with ethylene glycol, diminishing the solvation interaction of zinc ions with water.…”

Section: Electrolyte Optimizationmentioning

confidence: 99%

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Zinc‐ion hybrid supercapacitors: Design strategies, challenges, and perspectives

Chen

Zhang

Gao

et al. 2022

Carbon Neutralization

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Zinc‐ion hybrid supercapacitors (ZHSCs) may be the most promising energy storage device alternatives for portable and large‐scale electronic devices in the future, as they combine the benefits of both supercapacitors and zinc‐ion batteries. Even though many surprise outcomes have been accomplished with ZHSCs, the creation of suitable cathode materials and electrolytes, as well as the enhancement of zinc anodes, continue to be the most difficult obstacles in the development of high‐performance ZHSCs. The low capacitance of the cathode material, poor stability, and low utilization rate of the zinc anode seriously affect the electrochemical performance and application of ZHSCs. Furthermore, parasitic processes in aqueous electrolytes, such as the hydrogen and oxygen evolution reactions might result in low‐voltage windows and unsatisfied cycling performance of the ZHSCs. This review provides a concise summary of the most recent developments and energy storage mechanisms in ZHSCs. Meanwhile, the cathode material design strategy (structural engineering, hybrid‐composite design, heteroatom doping, and so on), the zinc anode design strategy (zinc foil improvement, zinc‐free metal composites, and so on), and the structure–activity relationship of the electrochemical performance of ZHSCs are discussed. Additionally, a summary of the impact of modifications in electrolyte composition on the electrochemical performance of ZHSCs is provided. Finally, this review also discusses the future development direction of ZHSCs. It is anticipated that this evaluation will serve as a helpful reference for the creation of high‐performance ZHSCs, which will hasten the development of these devices.

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Flexible Polymer Hydrogels for Wearable Energy Storage Applications

Mahdavian,

Allahbakhsh,

Bahramian

et al. 2023

Adv Materials Technologies

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The recent and fast‐growing trends related to the development of wearable technologies have raised the need for efficient and high‐performance energy storage devices having extra features such as flexibility and lightweight. Polymer hydrogels, as viscoelastic lightweight porous nanostructures with tunable surface and structural properties, can play a crucial role in the design of these future energy storage devices. Herein, recent developments and progress in the use of polymer hydrogels to design flexible and wearable energy storage devices are presented and discussed. The 3D structure of polymer hydrogels and porous nanostructures based on these hydrogels provides a platform to design flexible supercapacitors, batteries, and personal thermal management devices. Herein, different types of polymer hydrogels are presented, and their main fabrication techniques are reported. Moreover, the main structural properties affecting the energy storage performance of polymer hydrogels are discussed. In addition to recent progress in the design of polymer‐hydrogel‐based wearable devices, recent developments in polymer hydrogels for flexible applications (batteries, supercapacitors, and thermal energy storage systems) are reviewed in detail.

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High energy density, flexible, low temperature resistant and self-healing Zn-ion hybrid capacitors based on hydrogel electrolyte

Cited by 34 publications

References 37 publications

All-round supramolecular zwitterionic hydrogel electrolytes enabling environmentally adaptive dendrite-free aqueous zinc ion capacitors

All-round supramolecular zwitterionic hydrogel electrolytes enabling environmentally adaptive dendrite-free aqueous zinc ion capacitors

Zinc‐ion hybrid supercapacitors: Design strategies, challenges, and perspectives

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

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